Originally posted by Nein
cough cough...
the hp increase doesn't sum up like what you planned. Intake , exhaust , header all together give you about 15 hp gain average.
I'm going by the "estimates" given for each item by the manufacturers.
The 9.2 HP for the Injen Short Ram, on the other hand, is the actual measured HP, according to an article in the latest issue of Honda Tuning called "The Great Intake Test".
Of course when everything is put together, one item can maybe effect another, resulting in either less or more HP. That's something that would have to be Dyno tested.